Sometimes I could kiss my Mac. I love the little icon in the title bar is a draggable proxy for the file. I don’t remember how I noticed this, but it’s very handy. Apple describes it on this Pro Tips page so I’ll use their nice graphic:
So that’s great but it gets better. The file icon subtly indicates whether the file has any unsaved changes, by graying out. (Reading that page, I also learned that the red close button gets a black dot if there are unsaved changes.)
Here’s the thing that moved me to write a whole blog post: right click on that file to see and navigate its hierarchy in the file system. You ever need a file that’s in the same folder as the file you’re working with? Just right click on that icon and click the containing folder. So simple, sorta intuitive, and I can’t find it mentioned anywhere.